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396 active trials for Acute Myeloid Leukemia

Immunogenicity of an Anti-pneumococcal Combined Vaccination in Acute Leukemia or Lymphoma

The French Public Health Council recommended pneumococcal vaccination combined strategy for all immunocompromised patients in 2012. This strategy consisted in conjugated 13-valent pneumococcal injection followed 2 months later by polysaccharide 23-valent vaccine injection. General practitioners are usually in charge of this vaccination. Conjugated pneumococcal vaccine enhances the immunogenicity of the polysaccharide vaccine. Acute leukemia and lymphoma are treated with multiple courses of chemotherapy, impairing the immune system and potentially the response to vaccination. These patients are more at risk for developing pneumococcal invasive diseases than the general population. However, efficacy of pneumococcal vaccination is poorly documented in this setting. We assume that 70% of the patients are non-responders to vaccination, according to their anti-pneumococcal immunoglobulin G titers and the opsonophagocytic activity. To assess the immunogenicity of the pneumococcal vaccination combined strategy in adult population of acute leukemia and lymphoma, the investigator will measure anti-pneumococcal serotype-specific immunoglobulin G titers and opsonophagocytic activity at different time-points after completion of the combined vaccine strategy. The primary objective is to assess the immunogenicity of pneumococcal vaccination combined strategy at 3 months after the 13-valent pneumococcal injection (corresponding to 1 month after the end of the combined strategy) using immunoglobulin G titers and opsonophagocytic activity. At different time points (day 0, 1 month after the 13-valent pneumococcal injection, the day of the injection of the polysaccharide 23-valent vaccine, one month after the injection of the polysaccharide 23-valent vaccine, 3-6 months after the polysaccharide 23-valent vaccine,9-12 months after the polysaccharide 23-valent vaccine), the immunological response to vaccination will be monitored using specific-serotype immunoglobulin G titers, opsonophagocytic activity, and total anti-pneumococcal Immunoglobulin. The investigator will determine predictive factors of non-response to vaccination by comparing demographic data, biological data and treatment received by both acute myeloblastic leukemia and lymphoma patients. The tolerance and safety of the vaccination strategy will also be assessed in this specific hematological population.

Start: January 2021
Validation Study of a New Cytokine-based Dynamic Stratification Based on FLt3 Ligand Plasma Concentration Kinetic Profile and IL-6 Concentration During Induction of Acute Myeloid Leukemia

The investigators have recently demonstrated the strong impact in terms of survivals of Fms-like tyrosine kinase 3 ligand (FL) levels evaluated during intensive induction in acute myeloid leukemia (AML) patients. Indeed, three FL kinetic profiles were delineated: i) sustained increase of FL concentrations between day (D) 1 and D22 (FLI group, n=26, good-risk), ii) increase from D1 to D15, then decrease at D22 (FLD group, n=22, intermediate-risk) and iii) stagnation of low levels (<1000 pg/mL, FLL group, n=14, high-risk). However, with longer follow-up, the investigators have observed that FLI and FLD shared similar outcomes while FLL sub-group kept a very bad prognostic. Because serum samples from this previous study (called the FLAM/FLAL study) had been frozen-stored, the investigators were able to conduct an ancillary study assessing the potential impact of the kinetics of 6 other cytokines: TNFalpha, stem-cell factor, IL-1beta, IL-6, IL-10 and granulocyte-monocyte colony-stimulating factor (GM-CSF).. Only Il-6 level at D22 (< or >15.5 pg/mL) was associated with outcome allowing to distinguish between higher and lower survivals within the combined FLI/FLD sub-group. A new prognostic risk-stratification can thus be proposed as follows: FLI/FLD with IL-6 <15.5 pg/mL (favorable), FLI/FLD with IL-6 >15.5 pg/mL (intermediate) and FLL (high-risk). The aim of this new FLAMVAL study is to validate prospectively in a larger and independent cohort this prognostic risk-stratification i.e. that kinetic profile of FLT3L plasma level from D1 to D22 and Il6 plasma level at day 22 during induction of AML patients are predictive of overall and disease free survivals. For that purpose, 201 newly diagnosed AML patients treated intensively in the 25 centres of the French Innovative Leukemia Organisation (FILO) will be included in the FLAMVAL study.

Start: June 2021